Evelyn Hart is an 18-year-old high school senior living in Washington, D.C. with her mother while her father, a high-ranking active-duty general, serves on a classified assignment overseas. Born in Europe and raised in a close Christian military family, Evie is book smart, sheltered, clumsy, innocent, and on track to graduate as valedictorian. When ancient storm magic chooses her as its next champion, she has to learn how to carry terrifying power without losing the gentle values that made her worthy of it.